source3/winbindd/winbindd_getgrnam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_GETGRNAM
   4    Copyright (C) Volker Lendecke 2009
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "winbindd.h"
  22 #include "libcli/security/dom_sid.h"
  23 #include "lib/util/string_wrappers.h"
  24
  25 struct winbindd_getgrnam_state {
  26         struct tevent_context *ev;
  27         fstring name_namespace, name_domain, name_group;
  28         struct dom_sid sid;
  29         const char *domname;
  30         const char *name;
  31         gid_t gid;
  32         struct db_context *members;
  33 };
  34
  35 static void winbindd_getgrnam_lookupname_done(struct tevent_req *subreq);
  36 static void winbindd_getgrnam_done(struct tevent_req *subreq);
  37
  38 struct tevent_req *winbindd_getgrnam_send(TALLOC_CTX *mem_ctx,
  39                                           struct tevent_context *ev,
  40                                           struct winbindd_cli_state *cli,
  41                                           struct winbindd_request *request)
  42 {
  43         struct tevent_req *req, *subreq;
  44         struct winbindd_getgrnam_state *state;
  45         char *tmp;
  46         NTSTATUS nt_status;
  47         bool ok;
  48
  49         req = tevent_req_create(mem_ctx, &state,
  50                                 struct winbindd_getgrnam_state);
  51         if (req == NULL) {
  52                 return NULL;
  53         }
  54         state->ev = ev;
  55
  56         /* Ensure null termination */
  57         request->data.groupname[sizeof(request->data.groupname)-1]='\0';
  58
  59         D_NOTICE("[%s (%u)] Winbind external command GETGRNAM start.\n"
  60                    "Searching group name '%s'.\n",
  61                    cli->client_name,
  62                    (unsigned int)cli->pid,
  63                    request->data.groupname);
  64
  65         nt_status = normalize_name_unmap(state, request->data.groupname, &tmp);
  66         /* If we didn't map anything in the above call, just reset the
  67            tmp pointer to the original string */
  68         if (!NT_STATUS_IS_OK(nt_status) &&
  69             !NT_STATUS_EQUAL(nt_status, NT_STATUS_FILE_RENAMED))
  70         {
  71                 tmp = request->data.groupname;
  72         }
  73
  74         /* Parse domain and groupname */
  75
  76         ok = parse_domain_user(tmp,
  77                                state->name_namespace,
  78                                state->name_domain,
  79                                state->name_group);
  80         if (!ok) {
  81                 DBG_INFO("Could not parse domain user: %s\n", tmp);
  82                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  83                 return tevent_req_post(req, ev);
  84         }
  85
  86         /* if no domain or our local domain and no local tdb group, default to
  87          * our local domain for aliases */
  88
  89         if ( !*(state->name_domain) || strequal(state->name_domain,
  90                                                 get_global_sam_name()) ) {
  91                 fstrcpy(state->name_domain, get_global_sam_name());
  92         }
  93
  94         subreq = wb_lookupname_send(state, ev,
  95                                     state->name_namespace,
  96                                     state->name_domain,
  97                                     state->name_group,
  98                                     0);
  99         if (tevent_req_nomem(subreq, req)) {
 100                 return tevent_req_post(req, ev);
 101         }
 102         tevent_req_set_callback(subreq, winbindd_getgrnam_lookupname_done,
 103                                 req);
 104         return req;
 105 }
 106
 107 static void winbindd_getgrnam_lookupname_done(struct tevent_req *subreq)
 108 {
 109         struct tevent_req *req = tevent_req_callback_data(
 110                 subreq, struct tevent_req);
 111         struct winbindd_getgrnam_state *state = tevent_req_data(
 112                 req, struct winbindd_getgrnam_state);
 113         enum lsa_SidType type;
 114         NTSTATUS status;
 115
 116         status = wb_lookupname_recv(subreq, &state->sid, &type);
 117         TALLOC_FREE(subreq);
 118         if (tevent_req_nterror(req, status)) {
 119                 return;
 120         }
 121
 122         switch (type) {
 123         case SID_NAME_DOM_GRP:
 124         case SID_NAME_ALIAS:
 125         case SID_NAME_WKN_GRP:
 126         /*
 127          * Also give user types a chance:
 128          * These might be user sids mapped to the ID_TYPE_BOTH,
 129          * and in that case we should construct a group struct.
 130          */
 131         case SID_NAME_USER:
 132         case SID_NAME_COMPUTER:
 133                 break;
 134         default:
 135                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
 136                 return;
 137         }
 138
 139         subreq = wb_getgrsid_send(state, state->ev, &state->sid,
 140                                   lp_winbind_expand_groups());
 141         if (tevent_req_nomem(subreq, req)) {
 142                 return;
 143         }
 144         tevent_req_set_callback(subreq, winbindd_getgrnam_done, req);
 145 }
 146
 147 static void winbindd_getgrnam_done(struct tevent_req *subreq)
 148 {
 149         struct tevent_req *req = tevent_req_callback_data(
 150                 subreq, struct tevent_req);
 151         struct winbindd_getgrnam_state *state = tevent_req_data(
 152                 req, struct winbindd_getgrnam_state);
 153         NTSTATUS status;
 154
 155         status = wb_getgrsid_recv(subreq, state, &state->domname, &state->name,
 156                                   &state->gid, &state->members);
 157         TALLOC_FREE(subreq);
 158         if (tevent_req_nterror(req, status)) {
 159                 return;
 160         }
 161         tevent_req_done(req);
 162 }
 163
 164 NTSTATUS winbindd_getgrnam_recv(struct tevent_req *req,
 165                                 struct winbindd_response *response)
 166 {
 167         struct winbindd_getgrnam_state *state = tevent_req_data(
 168                 req, struct winbindd_getgrnam_state);
 169         NTSTATUS status;
 170         int num_members;
 171         char *buf;
 172
 173         if (tevent_req_is_nterror(req, &status)) {
 174                 struct dom_sid_buf sidbuf;
 175                 D_WARNING("Could not convert sid %s: %s\n",
 176                           dom_sid_str_buf(&state->sid, &sidbuf),
 177                           nt_errstr(status));
 178                 return status;
 179         }
 180
 181         if (!fill_grent(talloc_tos(), &response->data.gr, state->domname,
 182                         state->name, state->gid)) {
 183                 D_WARNING("fill_grent failed\n");
 184                 return NT_STATUS_NO_MEMORY;
 185         }
 186
 187         status = winbindd_print_groupmembers(state->members, response,
 188                                              &num_members, &buf);
 189         if (!NT_STATUS_IS_OK(status)) {
 190                 return status;
 191         }
 192
 193         response->data.gr.num_gr_mem = (uint32_t)num_members;
 194
 195         /* Group membership lives at start of extra data */
 196
 197         response->data.gr.gr_mem_ofs = 0;
 198         response->extra_data.data = buf;
 199         response->length += talloc_get_size(response->extra_data.data);
 200
 201         D_NOTICE("Winbind external command GETGRNAM end.\n"
 202                  "Returning %"PRIu32" memmber(s).\n",
 203                  response->data.gr.num_gr_mem);
 204
 205         return NT_STATUS_OK;
 206 }